Package-labeling machine



July 31, 1928. 1,6785% J. A. BUTLER v PACKAGE LABELING MACHINE eets-Sheet l Filed April 27, 1925 July 31 1928. 1,678,805

. J. A. BUTLER .PACKAGE LABELING MACHINE Filed April 2'7, 1925 8 Sheets-Sheet 2 July 31, 1928.

J. A. BUTLER PACKAGE LABELING MACHINE Filed April 27, 1923 8 Sheets-Sheet 3 (ii/701w July 31, 1928.

J. A. BUTLER PACKAGE LABELING MACHINE 8 Sheets-Sheet 4 Filed April 27, 1923 July 31, 1928.

J. A. BUTLER 4 momma LABELING momma Filed April 27, 1923 8 Sheets-Sheet 5 fill/612101 June/512171611421 July 31, 1928. 1,678,805

v J. A. BQTLER PACKAGE LABELING MACHINE Filed April 27, 1923 8 Sheets-Sheet 6 July 31, 1928.

J. A. BUTLER PACKAGE LABELING MACHiNE Filed April 27, 1923 8 Sheets-She e't v Inventor JauwaJZBz/tkz' at 2701' U July 31, 1928.

J. A. BUTLER PACKAGE LABELING MACHINE Filed April 27, 1925 8 Sheets-Shet 8 Invezzivr Jallms'flflutm' l 4 "ll r UNlTED STAT ES PATENT OFFICE.

JAMES A. BUTLER, OF NEEDHAM, MASSACHUSETTS, ASSIGNOR TO PNEUMATIC SCALE CORPORATION, LTD., OF NORFOLK DOWNS, MASSACHUSETTS, A CORPORATION OE MASSACHUSETTS.

Patented July 1928 PACKAGE-LABELING mncninn.

' Application filed April 27, 1923. Serial Ira-635,169.

tive before it reached said head. If the label reached the labeling head, it so interfered with the action of the labeling mechanism at said head as to require that the machine be stopped 'until the extra label,could be removed. i

To the end therefore of overcoming these ob ectiOns I have devised my present invention. According to my invention, I treat the operation of the machine from both a nolabel and a no-package condition. 65 The existence of a no-label condition is Instantly indicated by a no-label detector which is normally disposed in the path of movement of the labels on the glue drum for contact by each label as the faces of said 70 drum are intermittently revolved past said detector, The no-label detector dominates the label presser plate and also a rotatable device controlling the operation of the package feed mechanism. So long as the label feed is uninterrupted, the contact of the labels on the lue drum with the no-label detecto-r' will be inefiective upon said de-. tector, but whenever a no-label condition exists, the failure of label contact with said detector will leave the detector in position to prevent the label presser'pla te from functioning, andwill actuate a connecting rod from the'cam lever for the labelpresser plate to the rotatable package feed control device .to causesaid control device to assume a position wherein the-feed mechanism for This invention relates to package labeling 55 machines of the general type of the J agenberg drum labeler. In such a machine, the labels are stacked in a label hopper which is '5 disposed beneath and raised in properly timed relation to the feed of an intermittently revoluble gluing drum of polygonal form whereby to press the uppermost label in the stack against the undermost face of the drum. In a succeeding phase of rotation of the drum, the label 'ispressed or flattened against the drum face and when said drum face reaches a definite posit-ion in its cycle of rotation, the label is automatically stripped from the drum by a label grlpper mechanism and held in position for application to the package for which it is lntended The packages are intermittently fed in timed relation to the label feed so t at each package meets the label intended for it at, the labeling head of the machine where the label is wrapped around the package and the labeled package ejected from the labeling head.

25 Heretofore such machines have been open to the objection that if for any reason a label was not fed at each cycle of the machine, the

label presser would swing directly against the adhesively coated. face of the glue drum, instead of against the label on said face, and would itself be coated with glue, unless the operative noticedthe failure-of label feed in time, and grasped and bodily held back r the label presser from contact with the glue ntermittently advancing the package chain 3 drum. Whenever the label presser thus be- 15 rendered inefiective so long as the failure came coated with glue, it was necessary to of label feed continues. I 90 stop the machine and remove the glue from The existence of a no-paekag diti v 'the label presser beforethe machine could is instantly indicated by a nd-package deagain function properly. Moreover, when tector which is located adjacent the last the label feed failed, the package for which package space on'the package chain for coni 5 P feed chain to any reason i in time said labelwas intendedtwouldocontinue to feed through the machine and would not receive a label, unlessthe failure of the label feed was noticed in time bythe operative and the package bodily removedfrom the package feed chain before it entered the labeling head. On the other hand, if,for

upon the intermittently" revoluble package receive the label intended for it, the label would ;--be fed togthe labeling head, unless by the operative andthe wrapper stripped, from the. glue theopera:

a package was not 'in' position the failure of ieedwas noticedtact by each package as it is placed upon sa 1dchain. So lon as the last packa e space on said chain 1s occupied; by a pee age,the no-package detector is ineffective, but whenever said space is unoccupied, i e., a no-package condition prevails as regards said space, the failure of package contact with said detector will leave the detector in ,position to prevent advance of the package rected. Moreover, the glue drum will be to the'g d m? will be preyented frdm closing upon the label at that faced the drum opposite said fingers, the rotatable package feed control duced by the operative whenever desired,

as for example in starting the machine, at which time the glue drum is revolved several revolutions before the labels or ackages are fed in 0rd r to assurethat all. aces thereof will be adequately coated with glue, and in finishing the run of the packages through the machine, at which time the label feed is stopped by the operative at the moment that the remaining packages on the package feed chain coincide with the remaining number of labels already pressed against the faces ofthe glue drum.

The construction and operation of my invention, together with an embodiment thereof which well illustrates the principles "involved, is described and shown in the accompanying specification and v drawings,

= throughout which likereference characters are correspondingly employed and the char- 'acteristic features of novelty are particularly pointed out in the appended claims.

For the purposes of this application I shall show and describe my invention in its adaptation to a Jagenberg drum labeler machine,'although it will be understood that such treatment is purely illustrative and in no way limiting. In these drawings, therefore 1 is an end elevation as viewed from the left of Fig. 2 of a machine of this type equipped with safety mechanism in accordance with my invention.

Fig. 2 is a front'elevation thereofl Fig. 3 is a fragmentary end elevation showing the position of certain of the parts on. the return stroke of'thefeedchain pawl when the machine is functioning properly. Fig. 3 is a view similar to Fig. 3' and showing the further V on the feed stroke 0 the feedchain pawl when the machine is functioning properly, Fig. 3 'is' a further detail view showing the label stripped from the glue drum.

Fig. 4 is a diagrammatic view showing the position of, certain of'the parts when a no-label condition exists. Fig. 4 is a fragmentary detail showmg position of saidparts.

'the actuating lever for the label presser plate latched whereby to prevent operation I of said presser platewhen a no-label condition exists.

4 is a fragmentary detail showing themechanism for holding the no-label'detector out of action when a no-packagecondition exists.

Fig. 5 shows the position of certain of the parts when a nopackage condition exists.

Fig; 5 is a fragmentary detail showing the position of the nopackage detector when a no-package condition exists.

Fig. 5 shows the safety lock for the label hopper applied to prevent feed of the labels when ano-package condition exists.

Fig. 5 is a detail View of the dominant hand lever control for deliberately produc ing a no-package condition when the glue drum feed is started.

Fig. 6 is a View similar to Fig. 5 showing the position of the no-package detector when the packages are feeding normally.

Fig. 7 is an end elevation from the right in Fig. 2 showing the label gripper mechanism in its open, retracted position.

. F ig. 8 is a fragmentary detail from the left of, Fig. 2 and showing therotatablew package, feed control whichis actuated from the'no-label detectorwhen a no-label condition exists and which is prevented from ro-' tating when a no-package condition exists. Fig. 9 is a partial plan view of Fig. 8.

Fig. 9* is a side View, partly broken away,

of Fig. 9.

Fig. 10 is a partial plan view at the giue drum end ofthe machine.

Fig. 11 is a partial front elevation of the no-label detector;

Fig. 12 shows the safety lock for the gripper fingers applied to prevent said fingers closing when a no-package condition exists.

Fig. 13 shows the feed pawl for the pack 1 age chain rendered ineffective when a no-- label conditlon ex sts. I

Fig. 14 is a section on the line 1414 of Fig. 4.

Fig. 15 is an end view of the feed ratchet for the package chain and particularly showing the two independent shields forsaid ratchet.

Figs. 16 'to 21, inclusive, are-diagrammatic views illustrating the position of the parts during the cycle of the machine, Fig. 16-

showi'ng the start of the glue drum, Fig. 17

vthe start of the package feed, Fig. i18 the start of the label feed, Fig. 19-the position of the parts when the-last package has been fed to the package chain, Fig. 20 theposi-.

tion'of the parts when a no-label condition when a ,no-package condition'exists, and Fig.

. exists, and Fig. 21 the,position of the parts 22 is a fragmentary perspective-view partic- 'ularly illustrating theaction of thevno-label detector, and Fig. 23 is a fragment-arydetail view particularly illustrating the stop pin for limiting the hpward movement of the retarding latch 101.

. l have indicated at 1 an intermittently revolublepackage feed chain having spaced feed lugs 29 between which the packages are adapted to be centered. The feed chain 1 operates in a feed way 2 (Fig. 1) delivering to the labeling head 3 of the machine.

The labels L are stacked in a vertically disposedY'label hopper 4 (Fig. 2) which is adapted to be intermittently raised and lowered relative to the undermost face of an intermittently revoluble glue drum 5 of polygonal form whereby to press the uppermost label in the stack against the glue drum.

Each label is afterwards pressed flatly against the drum face by a swinging label presser 49, and when said face reaches the label pick-off phase in the cycle of rotation of the glue drum, the smoothed and flattened label is automatically stripped from the drum by a gripping mechanism, indicated generally at 6, Fig. 2; which is advanced towards and withdrawn from said drum at each cycle of the machine and is adapted upon its forwardmotion to close upon and peel the label from the drum and upon its rearward motion to open and release the label so that the label may be applied to'the package intended for it. v

The packages are successively removed from the discharge end of the feed chain 1 by a reciprocating pusher 7 (Fig. 2) which lays each package over a adapted to raise the package against the overlying label, the label being first pressed against the upper face of the package by a g and 2) downwardly meshing with a are actuated from moving plunger 8 which there upon recedes with the lifting plunger to carry the package and label upwardly past a series of brushes which wipe the label about the package. The labeled package is afterwards ejected from the labeling head along a delivery chute 9 by a reciprocating package ejector 10.

Driver-T have indicated at 11 (Figs; 1 the pow r shaft of the machine. Said shaft may be driven from any suitable power source, either by the pulley 12 or by the gear 11, and the drive may be applied and disconnected at will by means of a clutch 12' and a clutch shifting mechanism 13 operated from a pair of shipper levers 14.

The drive shaft 11 hasa pinion 15 thereon gear 16 on a cam shaft 17 journaled longitudinally of the machine. The package pusher 7 and package ejector drum cams 200 and 201, on said cam shaft and the downwardly moving package plunger 8 is actuated from a cam 202 on said cam shaft.

Package feeJ.-' When the machine is functioning properly, the package feed chain 1 is intermittentl"; advanced one package space respectively,

at each revolution of the cam shaft 17. To

I this end,

a feed lifting plunger the shaft 19 (Fig. 3) for the driving sprocket 20 of said chain has fastthereon ratchet 21. Fulcrumed upon the sprocket shaft 19 is a pawl lever 22 having P at its upper end a pawl 23 adapted to engage the ratchet teeth. At its lower end the pawl lever is connected by a rod 24 to a rocker lever 26- on a rock shaft 26 journaled longitudinally of the machine in rear of the cam shaft 17. The lever26 is connected by a rod 27 with an eccentric 28 on the cam shaft 17. 1

Glue dmtm.-Journaled above the cam shaft 17 and intermittently actuated therefrom is the shaft 18 for the glue drum 5.

Fast on the glue drum shaft is a ratchet 30 (Fig. 3) wit-h which engages a feed pawl 31 pivotally mounted upon a cam lever 32. The lever 32 is fulcrumed upon the glue drum shaft and carries a cam roll 33 disposed for actuation by a cam 34 on the cam shaft whereby the ratchet 30 is turned one tooth space at each revolution of the cam shaft.

In order to prevent shifting of the glue drum after each actuation of the feed pawl 31, I provide a drum locking pawl 37 which 1s drawn towards the feed ratchet 30 by a tension spring 371 (Fig. 2) so as to engage in a notch of the feed ratchet at substantially the moment that th feed pawl 31 is withdrawn from said ratchet thereby positively locking the glue drum at each step in its cycle of rotation. The locking pawl 37 is disengaged from the ratchet 30 by a cam 38 on the cam shaft 17, (Fig. 2). s

The glue drum 5 revolves relative to a glue pan (Fig. 7) and is supplied with glue therefrom by intergeared transfer rolls 36.

Label feed.The labels L arestacked in the label hopper 4 and said hopper is moved towards and from the glue drum at each revolution offthe cam shaft 17 whereby to press the uppermost label of said stack against the undermost face of the glue drum. To this end, the label hopper lifting plunger 47 (Fig. 2) is tensioned by heavy coil springs 48 which normally raise the hopper towards the drum. The hopper is returned at each revolution of the cam shaft by .a cam 39 (F g. 5) on said shaft which bears against a cam roll 40 on a rocker arm 41 fast at one end of a rock shaft 42. At its oppositeend the shaft 42 has fast thereon an arm 43 (Fig. 7) adapted to bear upon a pin 44 at one end of a lever '45. The lever 45 is slotted between its ends to engage over a stud 46 on the label hopper lifting plunger 47 whereby to hold. said plunger down against the action of the tension s rings 48.

7 Label pressen -A terthe label hopper has been raised to transfer the uppermost label in the stack to the glue drum and has again lowered the'label press'er plate or flattener 49 (Fig. 3) is automaticallymoved against v i the face of the-drum opposite it, whereby to from the rock shaft 53'to the'rockfshaft 54 by an arm 607mg. 2) on the shaft 53, a connecting rod 61 and a rocker arm 62 connected to said rod and fast to a rock shaft 63 journaled in rear of the rock shafts 53 and '54. Fast upon the r ock shaft 63 is a rocker arm similar to the rocker arm 62 and connected by a rod to an extension 64 on the rock shaft 54, whereby the rocker levers 51 I and 52 are swung in unison at each actuation of the cam lever and rock the label presser 49 towards and from the glue drum.

Label gripper.--The label gripping mechai nism is mounted'upon a horizontally disosed slide. 65

(Fig. 7) guided in a: slide rame 66 and reciprocated towards and from the glue drum in properly timed relation to the rotation thereof by a. link 67 which is connected at one end to said slide and at its opposite end to a rocker lever 68 o the rock shaft 26. Fast on the opposite end of said rock shaft is a rocker lever 69 (Fig. L) which is linked at 70 to a cam lever 71 having a cam roller 72 operating in the groove of a a closed cam 73 (Fig. 2) on the cam shaft.

springs 76 (Fig. 2) coiled abou (Fig.

The label gripping mechanism comprises a relatively stationary gripping plate v74 72 and a superposedseri'es of spaced relative movable ripper fin ers 75 which are yiel ably urged towards skid plate by projections on the fingers themselves.v The gri per fingers are mounted u on a rock sha t'77 which is journaled ,in earings risingfrom the gripper plate and is rocked in properly timed relation to the rotation of the glue drum to close the fingers upon the label after they enter the pick-off slots90 in the faces of the drum upon the forward throw of the slide 65 and to open said fingers to release the label when the slide is retracted.

To this end the rock shaft 77, has fast thereto a lever 78 which is connected by a opposite arm of the bell crank 'leverg80 is .-connected by a rod 81 (Fig; 12) to one end of a lever 84, which is fulcrumed between its "ends on a rock shaft 83. Fast on the opposite I end of the lever 84 is .acam roller 85 disposed .for actuation by a ca'm86 (Fig.2) on the l I v I cam shaft 17.

1V o-Zdbel detector. According to my present invention whenever a no-label condition exists, the label presser 49'is automatically held out of operation and the rotation of the package feed chain is automaticall prevented so that the package to whic .the label would have been applied is held back from the lebeling head until the next label is properly fed. To this end I provide a no-label indicator ordetector 89 'Fig. 11) adapted to instantly indicate the ailure of label feed, and as contemplated herein operating in the same slots 90 at the meeting edges of the several faces of the lue drum 7 within which the label gripper ngers are adapted to enter in order to grasp. and withdraw the label fromthe drum as each face of the drum reaches the pick-off position in \its cycle of rotation.

. The detector 89 .is fast upon .the right hand end of a rock shaft 91- (Fig. 11 and Fig. 22) journaled longitudinal y'of thema I chine parallel to the cam shaft 17in \bearings .92 and .93. Fast upon the left hand endof saidrock shaft is a .dog 94 (Fig. 4 and Fig.22) adapted to enter a notch 95. located between the ends of a latch lever 96 which is pivoted at. its rear end to the frame of the machine at 9 7, and is adapted to be contacted andflifted at eachcycle of operation of the machine by a bumper cam piece 99, in Fig. 4, on the cam-57 which operates the cam lever '55 for the label presser 49. Pivoted at 100 .(Fig. 4) to the forward end of said latch lever is a 'spring-pressedretarding latch 101 adapted to normally clear the bent upper end 1020f the lever 55; The 1 spring for the latch 101 is designated at 101 in Figs. 4, and 22. In order to limit the extreme upward movement of the latch 101, said latch adiacent the: end opposite the latching end iscut out as indicated at 3.00.

The cut-out 300'is adapted to abut against a stop pin 301- carried by the lever 96 so that ,whe'n'the dog 94 is down, as where there is a label on the drum, the retarding latch, is prevented from moving upward far enough to catch lever. 55. I 1 East on the rockshaft 91 beyond the bearon the end 102 of the cam ing 92 is a counterweight lever 104 (Fig. 4"

and Fig. 22) into whichis threaded at one end'a screw 105 having adjustable counterweights 106 thereon whereby the balance of said lever 104 may be varied.-. 'The other end of the lever 104'. is ada ted tocontact;

an adjustable. gage screw 10 mounted on a block 92- fastened to said bearing plate..92. The counter-weight lever 104 normally causes the no-label detector 89'to lie. in position to enter the nearest slot of the series of slots 90. in the glue drum faces as each face is successively rotated therepast. I When the feed ofhe'labels is normal, the

physical presence of the label itself will (Fig. 8)

the detector 89 out of said slot, rocking its cam 57. This allows the bent upper end 102 of the lever 55 to pass freely over the top of the retarding latch 101 (Fig. 3) and hence the label presser plate is not prevented from operating.

When a no-label condition exists, however, the detector finger 89 will not be rocked and the latch dog 94 will not be carried into position to enter the locking notch of the latch lever 96 when the cam piece 99 passes from beneath said lever. The locking dog will therefore prop up the latch lever and the retarding latch 101 will remain in the path of the bent upper end 102 of the cam lever 55 (Fig. 4 so that the tension spring 58 cannot keep the cam roller 56 of said lever in contact with the cam 57 and hence the label presser 49 will be prevented from swinging against the glue drum.

Automatic package feed c0ntr0Z.When a 110-label condition exists and the operating lever 55 for the label presser 49 is held out of operation, would have been applied is held back from. the labeling head until the next label is properly fed. To this end, the cam lever 55 is connected by a rod 111 with a rotatable package feed control, indicated generally at 108, Fig. 1, and efiective whenever the lever 55 is held out of operation to interpose a ratchet shield 110, carried by an arm 109 which is fulcrumed on thesprocket shaft 19 v for the package feed chain 1, between the feed pawl 23 and the sprocket driving ratchet 21 whereby to prevent advance of said feed chain so long as the no-label condition exists.

As here shown, the rear end of the rod 111 is connected to a cam throw-01f lever 112 which carries at its lower end a pin 113 extending through a slot in the rear end of said connecting rod. Anchored to said pin and the connecting rod 111 is a coil spring 114 adapted to allow the connecting rod to move forwardly when the label presser lever 55 operates at its extreme outward throw. The upper end of said cam throwoli" lever 112 is provided with a pin 115 projecting through an arcuate slot 116 in a-fixed casing 117 which is supported upon the bed plate of the machine. The slot 116' is a clearance slot to permit the play of the cam throw-off lever and one end of said slot also constitutes a limiting stop to check the motion of said lever in one direction. The

lever is checked in its opposite direction by a stop pin 118 projecting from the fixed casing 117 into the path of saidlever.

. (Fig. 4).

the package to which the label The pin 115 is disposed in the pathof a series of double-ended dogs 119 which are pivoted between their ends at 120 toa rotating disc 121 mounted within said fixed casing and driven from the cam shaft of the machine by a sprocket 122 loose on the stub shaft 123 which carries said, disc,

The sprocket 122 is connected by a chain 131 to two idler sprockets 132 and a sprocket chain. 133 connects one of these idlers with a driving sprocket 134' on the cam shaft rotating disc and the cam shaft is in direct relation to the number of faces of the glue drum between the face at which the label presser 49 operates and the face at which the label gripper fingers strip the label from the drum.

When the lever 55 is held out of operation, due to a no-label condition, the cam throwoff lever 112 will be rocked on its pivot to bring its dog-actuating pin 115 into the path. of the rotating dogs 119 so that when one of said dogs contacts said pin the opposite end of the dog will be swung upwardly against one of a series of spring-tensioned cam The driving ratio between thepieces 135 (Fig. 8) which are pivotally mounted at 136 at one end upon the fixed casing. The cam piece thus actuated will be projected beyond the periphery of the rotating disc against the tension of its spring 135 into the path of a cam roller 137 which is carried by an arm 138 fast on a rock shaft 139 journaled in suitable bearingsadjacent' the fixed casing 117.. At its opposite end said rock shaft 139 is provided with an arm 140 which is connected by a rod 141 with the ratchet shield carrying arm 109. The camroller 137 is normally held against the periphery ofthe disc by a coil spring 142 (Fig. 8) This spring also tensions the lever 140 so as to return said lever after actuation- When, therefore, a no-label condition exists, the label presser 49 is automatically held out of operation and the advance of the package feed chain 1 is prevented until the failure of label feed has been corrected.

No-gmckage detect0r.-According to my invention, when through failure of the package delivery there is no package in the last package space of the feed chain 1, the advance of said chain is stopped until a package has been fed. To this end I mount at the last package space of the chain apackage detector'144 which, as here shown, ,is formed a finger fast on. a rock shaft 146 journaled throu b one of the side rails constitutingthepac age feedway'2and counterbalanced "as indicated at 145 'to normally latch dog 148.. Said dog ,is pivoted between its ends atv 149 .and is overbalanced at its rear end so that its forward end tends to cogstantly project againstsaid cam surface The rear end of the latch dog 148 is provided with a hook 150 adapted to play relative to the latching point of the vertical arm 151 of a. bell crank lever 152." The lever 152 is pivoted between its ends at 153 and is spring-tensioned as indicated at 152. The horizontal arm 154 of the lever 152 terminatesin a latching point .155 adapted to play between the forward edge of a latch shield arm 156 and a cam piece 157 fast to and spaced from said arm. The arm 156 is fulcrumed upon the sprocketshaft 19 for the package feed chain and carries a ratchet shield 158 adapted to play over the feed ratchet 21 for said chain. Projecting from said arm is a lug 159 adapted to be contacted by the feed awl lever 22 before said lever reaches the llmit of its rearward mov tion. Below its fulcrum 19v the arm 156 is connected bya rod- 161 with a bell crank" .lever 162 which is fulcrumed at 163 and is spring-tensioned as indicated at 160. L 1 The spring 160 constantly tends to draw the arm 156 forwardly so that the shield 158will be interposed between the ratchet 1 21 and feed pawl 23, but normally the tension spring 152 for the bell crank 152 is holding said lever in such position that the latching point 155 thereof will lie between th arm 156 and cam piece 157 a will preve t the shield from being 0 rried far ilpough forward to cover the ratchet (see Whenthe feed of the packages onto the chain 1 isv normal, each package depresses the detector 144 as it passes thereover and in such passage lifts the latching end 150 of the dog 148 away from the bell crank lever 152, (Fig. 6),.thus allowing the latch ing point 155 of said lever to be rocked,'by the spring'152', into-the path of the shield arm 156' whereby to prevent said arm from being rocked forwardly, by the spring- 160, far enough to cause the shield 158 .to cover the feed ratchet 21. The feed pawl 23 may therefore engage and rotate said ratchet onetooth space at the next forward throw of the feed pawl lever 22 whereby to advance dition exists and the bell crank lever 162' glue drum 'to be locked against rotation.

.ciently far to expose the feed ratchet 21yto the-pawl 23 so that the pawl may engage and rotate the ratchet one tooth space upon the next forward throw of the pawl lever 22. The same contact of the lever 22 and proj'ection 159 also causes the cam piece 157 to lift the latching point 155 of the bell crank lever 152 away from the ratchet shield arm so as to latch said lever to the dog 148 as shown in Fig. 5

If no package occupies the last package space of the feed chain, the detector 144 is not depressed and thebell crank lever 152 remains latched in the position of Fig. 5 by the engagement of its vertical arm 151 with the hook end 1500f the latch dog 148. The latchin point155 is thus removed'from the path of the shield arm 156 so that said arm may be swung forward by the tension spring 160 ,to interpose the shield158 between the feed ratchet 21 and pawl 23 and prevent the pawl from engaging the ratchet and advancing the feed chain.

The forward movement of said arm 156 through the connecting rod 161 rocks the bell crank lever 162. forwardly, and such movement of the bell crank lever automatically applies a series of safeties to (1) stop the rotation of the'glue drum; (2 prevent the label hopper from feeding; (3) prevent the gripper fin ers from closing; (4) stop' the rotation of the package feed control; and prevent the no -label detector from functloning. These several safeties are all.

I applied simultaneously with the arrest of the" package feed chain.

Ghte drum Zocic.--When a ne-package coni 10 has been-rocked forwardly, an arm'164' (Fig.

5) fast on the pivot shaft for said lever is carried forwardly therewith to .cause the Said arm is linked-at 165 to an arm'166 loose onthe glue drum shaft. The'arm 166 is provided at its free end'with a cam surface 167 normally disposedout of the. path of a pin 168 projecting from the feed pawl 31 for the glue drum shaft. Upon actuation of said arm 166, .the cam 167 will be turned sufficiently tocontact the pin 168 and move the feed pawl 31 away from the feed ratchet 30 for the glue drum shaft (Fig. 21) so as to revent further rotation.

of said shaft until t e failure of the package\ feed hasbeen corrected, at which time the bell crank lever 162 will be rocked in the opposite direction to withdraw the cam 167 from the pin 168.

Label hopper loch-The same forward movement of the bell crank lever 162, through a connecting rod 169 fastened there,- to, depresses a yieldable lever 170 (Figs. 5 and 21), one arm of which is pinned to a rock shaft 171 and the other arm of which carries a latch 172 (Fig. 5) adapted to engage over a latching lug 17 3 on the actuating lever 11 for the label hopper whereby to lock the hopper against feeding movement whenever a no-package con dition exists;

Gripper finger lode-When the rock shaft 171 is turned, by depression of the lever 170, a latch 17-1: (Fig. 12) fast on the opposite end of said shaft is carried over a pin 175 on the cam lever 84 for opening the gripper fingers. The lever 84 is therefore locked against actuation by the cam 86 so long as the no-package condition exists.

Clutch shift for rotatable package feed c0ntroZ.--Slidable on and keyed to the hub of the drivingsprocket 122 for the rotatable package feed control 108 is a sleeve 124 (Fig. 9) having a drivingpin 129 adapted to engage in one of a series of driving openings 130 formedin the adjacent face of the rotatable disc 121 of said control. Fivoted at 125 to one of the bearings for the sprocket shaft 123 is a clutch yoke 125. Both ends of said yoke are forked and provided with pairs of spaced alined pins126. The lower pin pair engages and actuates the sliding sleeve 12 1. The upper in pair engages a donblethreaded worm 12 formed on a rock shaft 128 journaled above thesprocket shaft 123.

17V hen a no-package condition exists, and the bell crank lever 162 has been rocked forwardly, an arm 176 (Fig- 4) fast on the pivot shaft for said lever is" also rocked forwardly to disengage the drive pin 129 from the rotating disc 121. Said arm is linked at 177 to an arm 178. yieldably ounted on the rock shaft 128 whereby to roe said shaft and with it the yoke 125 so as to withdraw the pin 129 from the driving openings 130 of the disc 121, thus prevent ng further rotation of said disc.

In order to positively lock the disc against rotation after the yoke 125 has been rocked to disengage the driving pin 129, the yoke 125 is provided above its pivot'with a locking pin 125 adapted to enter in one of a.

series of spaced locking notches 125"" formed in theiperiphery of said disc. By arranging the driving and locking pins 129 and 125,

. respectively, below and above the pivot for the yoke 125 it results that the same movement of the yoke in one direction, simultane ously withdraws the driving pin from and engages the locking pin with the disc, and vice versa.

N o-Zmbel detector loch-Whena no-package condition exists and the bell crank lever has been rocked forwardly, an arm 17 9 (Fig. 4) on the shaft 163 for said lever is rocked forwardly to cause the no-label detector 89 to be locked out of action. The arm 179 is linked at 180 to a latch 181 (Fig. t?) which is fulcrumed between its ends at 182 to the bearing plate 92 for the no-label detector shaft 91. At its forward end the latch 181 is adapted to rest upon a lat-chlever 183, also fulcrumed upon the plate 92. The lever 183 terminates in a latching shoulder 18% adapted to drop onto a dog 185, see Fig. 1,

- mounted upon the shaft 91 when the arm 179 is rocked forwardly and the engagement of said dog. 185 with said shoulder 1841 prevents said shaft from being rocked towards the glue drum 5 by its counterweight. The nolabel detector will therefore be prevented from entering the slot'of the glue drum face opposite it and the retarding latchllll will be prevented from interfering with the ac- .tion of the label presser operating lever 55.

Starting m0oement.-The shipper lever for the clutch. at the drive shaft is first rocked to throw in the clutch and start the rotation of the cam shaft. This shaft ro-v Tn starting the machine, the operativeusually runs the glue drum a few revolutions to insure that all faces thereof will be coated with glue'before the labels and packages are fed. To this end 1 provide a dominant hand" lever 186 (Flg. 5) which is loosely mounted by a pin and slot connection 253 at one end of arock shaft 187. Looselymounted by a pin and slot connection 251 upon the oppositeend of said shaft is a latch 188 which is adapted to drop onto the top of the moving bell crank lever 162 and latch said lever against motion.

or the other side ofthe verticalso that it may gravitate in either direction when thrown by the-operative. This is necessary because the spring-tensioned shield carrying arm 156 ill) I Thehand lever 186 is a weighted lever and is always disposed at one which actuates the bell crank lever 162 is constantly in intermittent motion and hence the bell crank leveris not always in position to be effectively latched by the latchpiece 188 when the hand lever is swung to throw the latch piece down onto the bell crank lever.- The latch piece simply therefore drops upon the top of the bell crank lever and rides over behind it into effective latching position as the hand lever continuesto gravitate to its lowest position.

' After the glue drum has been sufficiently coated with glue, the hand lever 186 is rocked in the opposite direction to release the bell crank lever 162. Inasmuch as a non-label condition still exists however the ratchet shield 110 will still be interposed between the feed ratchet 21 and the feed pawl 23. for

the package chain so as to prevent said chain from advancing (Fig. 17). To overcome this safety look, I provide a dominant hand lever 191 which is linked at""192 to the cam throw-off lever 112 (Fig. 18) and upon actuation draws the pm 115 of said lever '112 out "of the path of the dogs '11!) sov that the cam' roll 137 will, not be actuated by the rotating cams 135. The shield 110 will now be drawn 1 backwardly by the tension spring 142 to expose the feed ratchet 21 to the feed pawl 23 so that the package feed chain may be advanced.

The operative now starts the feed of the labels by throwin in the usual hand starting lever 189.(Fig. 7) to permit operation of the'label hopper. This lever isvpivoted at 190 and has a canrface adapted when the starting lever is thrown down to release the tail of the label hopper lockinglever and when the startin lever is thrown up to engage'and lock said lever 45 against the lifting action of the elevating springs for the label hopper. 3 K I In completing the run of the machine the operative counts thepackages remainin on the package chain and when the. ac age number is equal to the number of la elsre maining on the glue drum, the label starting lever 189 is thrown up to prevent the feed of any morelabels, and the hand lever 186 is thrown down to again latch the bellcrank lever 162 and permit the feed chain to ad- I packages thereon elements in-timed relation to each other, of a means for automatically preventmg opera- ;tion of the label presser upon a failure of label placement on the glue dfumr 2, In a labeling machine, the combinat on {with a glue drum a label feeder, a' label presser, a package feeder, and mechanism for operating said elements in timed relation to each other, of means for automatically preventing operation of' both the label presser and the package feeder upon a failure of label placement on the glue drum.

3. In a labeling machine, the comblnation with a glue drum, a 'label ffeeder, a label presser, a package feeder, and im'echamsm' for operating said elements in timed relation to each other, of means for automatical 1y preventing operation of both the label presser and the package feeder upon a failure of label placement on the glue drum, and

means for automaticallypreventing opcration of both the label feeder and thepa-ckagfi feeder upona failure of package placemen on the package feeder.

fl. In'a labeling machine, the with a glue drum, a label feeder, and mechcombination anism for operating said elements in timed relatlon .to each other, of automatically operative means actingv independently of the quantity of labels in thelabel feeder to prevent operation of the package feeder whenever the label feeder for any reasons fails to place a label on the glue drum.

for operating sai elements in timed relation,

operating said 5; In a labeling machine, the combination.

with a glue drum, a label feeder, a package feeder, and mechanism for, operating said Zlements in timed relation to eachother, of utomatically v operative means acting inde-, pend'ently of the quantity of labels in the label feeder to prevent operation of both the label feeder and the ackage feeder whenever the label feeder -f )r any reason fails to place a label on the glue drum.

6. In a labeling machine, the combination with a glue drum, a label feeder, a label presser, and mechanism for operating said elements in timed relation to each other,

of means for automatically preventing op-- eration of the label presser-upon a failure of label placement on the glue drum, and a semi-dominant hand control for deliberately producing a no-label condition.

7. In a labeling machine, the combination I with a glue drum, a label feeder, a label presser, a packa e feeder,- and mechanism to each other, "of means for automatically preventing operation of both thelabel pres ser and the package feeder upon a failure of label placement on the glue drum, means for automatically .preventin failure of'package placement on the package feeder, a semi-dominant hand control for deliberately producing a no-labelcondition, and a dommant hand control for overcoming such condition. 2

-8.' In a labeling machine,'the combination with a glue drum, a label feeder, a label presser, and mechanism for operating said elements in timed relation to each other, of means automatically effective-upon a failure of label placement on that face of the glue drum opposite said label presser to prevent operation of said label presser. I

9. In a labeling machine, the combination with a glue, drum, a label feeder, a label presser, a package feeder,-and mechanism for e ements in timed relation to operation of the label feeder and the pac age feeder upon 'a till control for the package feeder, a no-label each other, of means automatically elfectivev upon a failure of label placement on that face of the gluedrum opposite said label presser to prevent operation of both saidlabel presser and said packa e feeder,

10. In a labeling machine, t e combination with a glue drum, a label feeder, a label presser, a package feeder, and mechanism or operating said elements in timed relation to each other, of means automatically effective upon a failure of label placement on that face of the glue drum opposite said label presser to prevent operation of both said label presser and said ackage feeder.

11. In alabeling mac ine, the combination with a glue drum, a label feeder, a label presser, a package feeder, a label gripper, and mechanism for operating said elements in timed relation to each other, of a no-label detector automatically effective upon a failme of label placement on the glue drum to prevent operation of both said label pr sser and said package feeder, locks for the glue drum, label feeder, label gripper, and nolabel detector, and means automatically efi'e'ctive upon a failure of ackage placement upon the package fee or to prevent operation of the package feeder and to apply the glue dr, label feeder, label gripper, and no-label detector locks.

12. In a labeling machine, the combination with a glue drum, a label feeder, a label presser, a package feeder, a label gripper, and mechanism for operatingsaid elements in timed relation to each other, of a rotatable control for the package feeder, a no-label detector automatically eflective upon a failure of label placement on the glue drum to prevent operation of said label presser and to actuate said control whereby to prevent operation of the ackage; feeder, locks for the glue dr, labeffeedenllabel gripper and no-label detector, and means automatically efiective upon a failure of package placement upon the packa e feeder to stop the rotation of said contro whereby to prevent operation of the package feeder-and to apply the glue drum, label feeder, label gripper, and no-label detector loclrs, i

13. lln a labeling machine, the combination with a glue dr, a label feeder, a label presser, a packagefeeder, a labelgripper, and mechanismvfor operating said elements in timed relation to each other, of a rotatable detector automatically efiective upon a failare of label placement on the glue drum to prevent operation of said label/presser and to actuate said control wherebyto prevent operation of the package feeder, locks for the glue dr, label feeder, laber gripper and 'nodabel detector, and means automatically efiective upon a failure of package. plaement upon thepackage feeder to stop the rotation of said-control whereby to prevent operation of the package feeder and to apply the glue drum, label feeder, label gripper, and no-label detector locks, a semldominant hand control for deliberately producingano-label condition, and a dominant hand control for overcoming such condition.

14. In a labeling machine, the combination with an intermittently revoluble glue drum, an intermittently operable label feeder, an intermittently operable label presser, and an intermittently revoluble package feeder, and means for intermittently operating said elements in timed relation to each other, of means automatically applied upon a failure of label placement on the glue drumto prevent bperation of the label presser and the package feeder and means automatically applied upon a failure of package placement on the package feeder to prevent o oration ofthe package feeder and the label eeder. 15. In a labeling machine, the combination with an intermittently revoluble faceted glue drum, an intermittently operable label feeder, and an intermittently operable label presser effective to successively press the labels against the face of 'the glue drum opposite thereto, of a no-label detector co-acting with the labels on said drum as the drum 1s suc- I cessively rotated therepast, and a latch con-. trolled by said detector and effective to prevent operation of said label presser upon a failure of label placement on the glue drum.

16. In a labeling machine, the combination with an intermittently revoluble faceted glue drum, an intermittently operable label feeder, and an intermittently operable label presser efi'ective to success1vely press the" labels against the face of the glue drum opposite thereto, of a no-label detectorf disposed at that point in the orbit of the drum at which the label presser operates and co-acting with the labels on said drum as the drum 1S successively rotated therepast, and a latch con 1 and an intermittently operable label presser press the labels efiective 3 to successivelygl against the face of the ue drum. opposite -thereto,-of a no-label detector disposed at that point in the orbit of the drum at which 1 the label presser operates and is successively rotatedtherepast, and a latch controlledby said det ctor and efiective'to prevent opera- -tion of said label presser upon;v a failure of label .placeinent'on the glue drum,- and a dominant hand control for deliberately producingfa no-label condition.

tion with an intermittently revolubleglue 18. In a' labeling machine, the combinadrum, intermittently operable-label and 39 package feeders, and an intermittently op; 1/

erable label presser effective to successively press the labels against the face of the glue drum opposite thereto, of alno-label detector actuated by the labels on said drum as the drum is successively rotated therepast, a latch controlled by said detector and effective to prevent operation of said presser whenever a no-label condition exists, a control for the package feeder, and an operative connection from the label presser to said control for actuating said control and preventing operation of said package feeder upon a failureof label placement upon the glue drum.

19. In a labeling machine, the combination with an intermittently revoluble glue drum, intermittently operable label and package feeders, and an intermittently operable label presser effective to successively press the labels against the face of the glue drum opposite thereto, of a no-label detector actuatetl by the labels on said drum as the drum is successively rotated therepast, a latch controlled by said detector and effective to prevent operation of said presser .whenever'a no-tlabel condition exists, a control for the package feeder, and an. operative connection from the label presser to said control for actuating said control and preventing o eration of said package feeder upon a fallure of label placement upon the glue drum, "and a no-package detector for automatically preventing operation of the package and la e1 feeders upon a failure of package placement on the package feeder.

20. In a labeling machine, the combination with an intermittently revoluble glue drum,

intermittently operable label and package feeders, an an intermittently operable label presser effective to successively press the labels against the face of the glue drum,

automatically effective upon a failure of package placement upon the package feeder to actuate the control for said feeder whereby to prevent operation of said feeder and to apply the glue drum, label feeder and no label detector locks.

4 21. In alabeling machine, a faceted intermittently revoluble glue drum having label pick-off slots at the meeting edges of its faces, a label feeder, a label presser for suecessively pressing the labels against the face of the drum opposite thereto, a no-label detector controlling the operation of said presser and disposed opposite the face of the drum at which said presser operates in position to enter one of the label pick-ofl slots operation of said presser and disposed in position to enter-one of the label pick-ofl slots as the drum is rotated therepast and lifted out of said slot by the label on the drum face so as to be ineffective upon the operation of the label presser but automatically preventing operation of said presser if no label is encountered, and operative connections from said label presser to said package feeder for preventing operation of said package feederwhenever a no-label condition exists.

23. In a labeling machine, a cam shaft, a

faceted glue drum having label pick-ofi' slots at the meeting edges of its faces and inter mittently revolved from said cam shaft, a label feeder intermittently operated from said. cam shaft, a labelpresser mounted %to swing towards and away from said lue drum, a cam on said cam shaft an a cam lever actuated by said cam for operating saidlabel presser, a no-label detector comprising a rock shaft having a finger disposed to enter one of the label pickofl slots as the drum is rotated therepast and normally lifted out of said slot by the label on the drum face 'so as to be ineffective upon the operation of the label resser, a locking dog on said rock shaft, aplvoted latch lever having a locking notch adapted to receive said dog, a camon the cam shaft for raising said latch lever relative to said dog and a retarding latch carried by the latch lever and normally disposed out of the path of the cam lever which actuated the label presser, but movable into interfering position relative to said lever whenever the nolabel detector finger fails to encounter a label on the glue drum. 1

24. In a labeling machine, a cam shaft, a

faceted glue drum having label pick-'ofi slots at the meeting ed esof its faces and inter mittently revolve from said cam shaft, a label feeder and a package feeder intermittently operated from said cam shaft, a

label pressermounted to swing towards and away from said glue drum, a cam on said cam shaft and a cam lever actuated by said cam for operating said label presser, a no-label detector comprising a rockshaft having a finger disposed to enter one of the label pick-ofi slots as the drumis rotated therepast and normally lifted'out of said slot by the label on the drum face so as to be ineffective upon the operation of the label presser, a locking dog on said rock shaft, a pivoted latch lever having a locking notch adapted to receive said dog, a cam on the cam shaft for raising said latch lever relative to said dog, a, retarding latch carried by the latch lever and normally disposed out of the path of the cam lever'which actuated the label presser but movable into interfering position relative to said lever whenever the no-label detector finger fails to encounter a .label on the his drum, a rotating control device for said package feeder and operative connections from said device to the cam lever which actuates-the label presser effective to prevent operation ofsaid package feeder whenever a no-label condition exists.

25. In a labeling machine, a cam shaft, a

faceted glue drum having label pick-ofl slots at the meeting edges of its faces and intermittently revolved from said cam shaft, a label feeder and a packae feeder intermittently operated from sai cam shaft, a label presser mounted to swingtowards and away from said glue drum, a cam on said cam shaft and a cam lever actuated by said cam for operating said label presser, a no-label detector comprising a rock shaft having a finger disposed to enter one of the label pick-off slots asthe drum is rotated ther past and normally lifted out of said slot by the label on the drum face so as to be ineffective upon the operation of the label presser, a locking dog on said rock shaft, a pivoted latch lever having a locking notch adapted to receive said dog, a cam on the cam shaft for raising said latch lever relative to said dog, a retarding latch carried by the latch lever and normally disposed out of the path of the cantilever which actuates the label presser but movable into interfer ing position relative to said lever whenever the no-label detector finger fails to encounter a label on the glue drum, a control device for said package feeder comprising a rotating disc, a series of cam actuating dogs pivotally mounted thereon a series of pivotally mounted cams normally disposed within the periphery of said disc, a cam throw-off lever having an actuating .pin

adapted to be moved into the path of said dogs, operative connections from said lever to the cam lever which actuated the label presser, and a cam lever normally held towards the periphery of said disc for actuation by one of said cams whenever a nolabel condition exists and efiective upon acprising a rock shaft having a finger and disposed for actuation by the labels upon the glue drumfa locking dog on said rock shaft, a pivoted latch lever having a locking notch adapted to receive said dog, a cam on the cam "shaft for raising said latch lever relative to said dog, and a retarding latch carried by said latch lever and normally disposed out of the path of the cam lever which actuates said label presser, but movable into interferingrelation to said lever whenever a nolabel condition exists,

27. In a labeling machine, a cam shaft, a glue drum, a label hopper and a package feeder intermittently operated from said shaft, a label presser mounted to move towards and way from the glue drum, a cam on said cam shaft and a cam lever actuated by said cam for operating said label presser, a no-label detector comprising a rock shaft having a finger disposed for actuation by the labels upon the glue drum, a locking dog on said rock shaft, a pivoted latch lever having a locking notch adapted to receive said do a cam on the cam shaft for raising said late lever relative to said dog, a retarding latch carried by said latch lever and normally illsposed out of the path of the cam lever which actuates said label presser, but movable into interfering relation to said lever Whenever a no-label condition exists, and operative connections from said lever to the package feed mechanism for preventing advance of the packages. whenever a no-label condition exists,

28. In a labeling machine, a continuously driven cam shaft, a glue drum. intermittently revolved therefrom, a label feeder and a package feeder intermittently operated from a cam on said cam shaft, a label presser pivoted to swing towards and from the glue drum, a cam lever for actuating said label presser, a cam on the cam shaft operating said cam lever, a no-label detector, a latch lever, a cam on the cam shaft for moving said latch lever relative to the no -label de-- tector, a retarding latch carried by said latch lever and normally disposed out of the path of the label presser actuating lever, but movable into the path of said lever whenever a no-label condition exists, a rotatable control device for the package feeder and an operative connection from the label presser actuating lever to the said device efi'ectivc whenever a no-label condition exists to actuatesaid device and the package feeder. I

29. In a labeling machine, in combination, a label feeder, a package feeder, and a glue drum, a label presser pivoted to swing towards and away-from the glue drum, a rotatable control device dominant upon the package feeder, a clutch therefor, a no-label detector effectiveupon failure of the label feed to prevent operation of the label presser and to actuate the rotatable package feed control device'whereby to render ineffective thepackage feeder, a clutch shifting mechanism to disconnect the drive for the rotatable package feed control device when a no-package condition exists, and a no-package detector associated with the package 'feedr for actuation by each package as it is placed thereon and effective when a no-package condition exists to prevent operation of the package feeder and to disconnect the drive for the rotatable package feed control device.

30; In a labeling machine, in combination, a package feeder, a label feeder, and a glue drum, a label presser pivoted to swing toprevent operation of wards and'away from-the gluedrum, a 'ro-- tatable control device dominant upon the package feeder, a clutch therefor, a no-label detector effective upon. failure of the label feed to prevent operation of the label presser and to actuate the rotatable package feed control device whereby to render ineffective the package feeder, a clutch shifting mechanism to disconnect the drive for the ro- 'tatable package feed control device when afeeder for actuationby each package as it ,is placed thereon and effective when a nopackage condition exists to prevent operation of the package'feeder, apply the no: label detector lock, and disconnect the'drive for the rotatable package feed control device.-

31. In a labeling machine, in combination, a label feeder, a package feeder, and a glue drum, a label presser ivoted to swing towards and away from he glue drum, a rotatable control device dominant upon the 1 package feeder, a clutch therefor, a no-label detector effective upon failure of the label feed to prevent o eration of the label presser and to actuate t e rotatable package feed control device whereby to render ineffective the package feeder, a lock-to prevent rotation of the label feeder when a no-package condition exists, a clutch shifting mechanism =to disconnect /the drive for the rotatable package feed control device when a no package condition exists, a lock to prevent operation of the no-label detector when a;

no-package condition exists, and a no-package detector associated with the package feedervfor actuation by each package as it is placed-thereon and effective when a nopackage condition exists to prevent operation of the package feeder, to apply the glue drum, label feeder, and no-label detector locks and to disconnect the drive for the rotatable package feed control device.

32. Ina labeling machine, in combination, a cam shaft, a label feeder, a package feeder, and a glue drum intermittently operated from said shaft, a label presser pivoted to swing towards and away from the glue drum, a label gripper movable towards and from the glue drum, means for opening and closing said label-gripper to grasp and release the label, a rotatable control device for the package feeder, aclutch therefor, a n0- label detector effective upon failure of the label-feed to prevent the operation of the label presser and to actuate the rotatable package feed control device whereby to render ineffective the package feeder, a lock to prevent rotation o the glue drum when 'a' no-package condition exists, a lock to prevent operation of the labeligripper closing when a no-package condition exists, a clutchshifting mechanism to disconnect the drive for the rotatable package feed control device when a no-package condition exists, a lock to prevent operation of the no-labeldetector ,when a no-package condition exists, and a no-package detector associated with the package feeder for actuation by each ackage as it is placed thereon and effective when a no-package condition exists to prevent-operation of the package feeder to apply the glue drum, label feeder, label gripper and nolabel-detector locks andv to disconnect the drive for the rotatable package feed control device.

33. In a labeling machine, a glue drum, a label feeder, a package feeder, a pawl and ratchet mechanism for intermittently operating said package feeder, a pivoted label presser movable towards and from said'glue drum, a no-label detector associatedwith the glue drumand effective when a no-label condition exists to prevent operation of said label presser, a' rotatable control device for the package feeder, an arm carrylng a ratchet shield and disposed for actuation by said control device to interpose said shield between the feed ratchet and the feed pawl for the package feeder whenever a no-label condition exists, and an operative connection from the label presser to said control device for actuating said device.

34. In a labeling machine, a gluedrum, a label feederna package feeder, a pawl and. ratchet mechanism for" intermittently oper-' ating said package feeder, a pivoted label presser movable towards and from said glue drum, a no-label detector associated with the Inc drum, and effective when a no-label conition exists to prevent operation of said T30 

